page {
  height: 100%;
  overflow: hidden;
  background-color: #f7f7f8;
}
.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
}
.example {
  padding: 15px;
  background-color: #fff;
}
.btn{
  background-color:#FFE5DE;
  margin: 10rpx 0;
}
